This book provides an in-depth exploration of the history, development, and applications of gamma knife radiosurgery, with a particular focus on its proliferation and utilization across Asia. The narrative offers a country-by-country account, detailing the implementation and advancements of gamma knife radiosurgery in various Asian nations. This regional analysis highlights the unique contributions and challenges faced by each country in integrating this advanced neurosurgical technique. The second half of the text delves into the diverse clinical applications of gamma knife radiosurgery in Asia, discussing its effectiveness and evolving methodologies in treating a range of neurological conditions, from vestibular schwannoma and meningioma to Parkinson's disease and obsessive-compulsive disorder.